The Twelve-Factor App ("The twelve-factor methodology can be applied to apps written in any programming language, and which use any combination of backing services (database, queue, memory cache, etc).")

Docker and all the related entities in the Docker ecosystem are
changing constantly (and at a fast pace) so many of the resources below can become
outdated or obsolete in a matter of months. Docker Releases occur
regularly, so pay attention to dates and version numbers in the
resources below when considering implementing something, but also look
for useful tips and tricks that may still be relevant over time. Also,
you may want to Subscribe to Docker Weekly Newsletter to maintain
your own situational awareness of updates and high-quality articles,
blog posts, and videos that can help you keep up.

GitHub Gist tristanfisher/Ansible-Vault how-to.md ("A short tutorial on how to use Vault in your Ansible workflow. Ansible-vault allows you to more safely store sensitive information in a source code repository or on disk.")

The AVG Rescue CD is quite useful for helping disinfect computers for family and friends. (Hint: Pre-position a CD at their house so when they call you for help, you don't have to talk them through downloading and burning an ISO image to CD-R!)